The correct answer is option 4 - Centripetal.

When rivers discharge their waters from all directions into a lake or depression, it forms a centripetal pattern. In this pattern, the rivers converge towards a central point or a focal point. The rivers flow in different directions and merge together at the center. This creates a radial flow pattern resembling the spokes of a wheel.

Option 1 - Trellis: This pattern is characterized by a main river with many smaller tributaries flowing parallel to each other. It forms a grid-like pattern resembling a trellis or a ladder.

Option 2 - Dendritic: In a dendritic pattern, the rivers branch out like the branches of a tree. It is the most common and widely spread pattern found in nature.

Option 3 - Radial: In a radial pattern, the rivers flow outwards from a central highland or a peak. It forms a wheel-like pattern with the rivers spreading out from a central point.

Therefore, the correct answer is option 4 - Centripetal, as it describes the pattern where rivers discharge their waters from all directions into a lake or depression.